Singer Professional 5 User manual

Chapter 7:
Four-Thread Ultra-Stretch Mock
Safety Stitch

Four-Thread Ultra-Stretch Mock Safety Stitch
The Four-Thread Ultra-Stretch Mock Safety Stitch is stronger than the Three-Thread
Ultra-Stretch Mock Safety Stitch. The additional thread provides added strength to
the seam and is good choice for knits as well as wovens. This stitch works well when
applying ribbing to a garment. Ribbing is often seen on cuffs, collars and waistbands
of active wear. This stitch requires two needle threads and two looper threads.
Four-Thread Ultra-Stretch Mock Safety Stitch page 1

ATD:
Auto Tension Dial
“A”
Left Cover Stitch
Needle “C” Not Threaded
Middle Cover Stitch
Needle “D” Not Threaded
Right Cover Stitch
Needle “E” Not Threaded
Overedge Left
Needle “A” (Orange) Threaded
Overedge Right
Needle “B” (Blue) Threaded
Upper Looper
(Green) Looper Engaged and Threaded
Lower Looper
(Red) Threaded
Chain Stitch Looper
(Brown) Not Threaded
Upper Looper Clutch “L”
Upper Knife Engaged
Seam Guide Plate Not Installed
Use Knife Guide
Seam Width Dial “N”
Stitch Length Dial “N”
Presser Foot
Pressure “N”
Differential Feed Dial “N”
Stitch Finger “N”
Spreader Disengaged
Set at:
Needle:
Four-Thread Ultra-Stretch Mock Safety Stitch page 2

Sweatshirt sample
Four-Thread Ultra-Stretch Mock Safety Stitch page 3

Turn Auto Tension Dial to “A”.
Turn Stitch Length Dial to “N”.
Engage Upper Knife.
The knife will not trim the fabric when it is disengaged.
1. Open Looper Cover.
2. Pull the movable knife holder (silver screw) to the right as far as it will go.
3. Turn the holder clockwise until the knife clicks into a lock position.
Upper Knife EngagedUpper Knife Disengaged
Four-Thread Ultra-Stretch Mock Safety Stitch page 4

Turn Presser Foot
Pressure Dial to “N”.
Turn Differential Feed
Dial to “N”.
Turn Seam Width Dial
to “N”.
 Set Stitch Finger to “N”.
Four-Thread Ultra-Stretch Mock Safety Stitch page 5

Install the Knife Cover.
Engage Upper Looper. Engaging the Upper Looper causes the looper to move
when sewing. Even though the Upper Looper is not threaded, it needs to be
engaged.
1. Push the clutch button to the left and down to engage.
2. Turn handwheel.
Upper Looper Disengaged
Upper Looper Engaged
Four-Thread Ultra-Stretch Mock Safety Stitch page 6

Disengage Spreader. The Upper Looper has a hole for the thread on the top of the
looper. If the stitch requires that the looper be engaged but not threaded then the
Spreader is used. The Spreader simply plugs-in (or closes) the looper’s hole. The
Spreader is disengaged when the Upper Looper is engaged/operative and threaded.
The Spreader is used with a stitch that requires only one looper thread. With
the help of the Spreader the single looper thread wraps around the fabric’s edge.
1. Lower the white handle on the Spreader to open the eye of the Upper
Looper.
Thread Upper Looper with regular overlock thread .
1. Raise the Presser Foot to release the tension disks. Thread the Lower
Looper as illustrated 1-9.
2. Pass thread from back to the
front through the thread
guide .
Four-Thread Ultra-Stretch Mock Safety Stitch page 7
Eye of Looper
Spreader Engaged Spreader Disengaged

3. Thread the top cover thread guide by pulling the thread towards the left until
it slips under the guide. Then pull the thread along the right side of the
button as illustrated.
4. While holding the thread firmly, pull the thread between the tension disks.
5. Turn the handwheel toward you until the lower looper extends 5-10mm
(approximately ½ inch) from the needle plate edge.
6. Thread the looper area of the machine following the green color coded
thread guides 4-9.
Four-Thread Ultra-Stretch Mock Safety Stitch page 8

7. Thread the hole in the Upper Looper from front to back . Pull about 4
inches of thread through the looper and place to the back of the
throat plate.
Thread Lower Looper with regular overlock thread.
1. Raise the Presser Foot to release the Tension disks. Thread the Lower
Looper as illustrated 1-10.
2. Pass thread from back to the front through the thread guide .
Four-Thread Ultra-Stretch Mock Safety Stitch page 9